TSDZ8 750W Mid-Drive Ebike Conversion Kit with Optional Battery - Upgrade Your Ride with Powerful Electric Bike Kit (68mm/73mm BB Length, Universal Fit)

Why did you pick this product vs others?: This motor is amazing, excellent amount of torque and runs very quiet. Super easy install as well. Highly recommend this for your upcoming electric bike conversion!

The torque sensing is great to have, as someone whose legs contribute power; that feature sets this product apart from the Bafang BBS02. The benefit of this motor over other 750w torque-sensing motors, like the new CYC Photon 2, is that this motor is significantly cheaper. As for the cons: the bottom bracket sometimes makes a creaking/clicking noise when pedaling with the motor engaged; the brake sensors are completely unnecessary (just don't engage throttle/pedal while braking... duh); and the computer screen lacks nuanced features, namely setting brightness below 30%. Another issue is that the motor's Anderson cable, which connects to the battery, would benefit from being a couple inches longer. Lastly, although I understand that a more sophisticated battery management system would increase price, the current system makes it difficult to predict range; the displayed battery percentage will stay at 100% for a long time, then quickly lose charge below 100%. This makes it difficult to estimate what percent to charge the battery to for a given ride. As an example of how bad the battery management system is, on a 35-mile commute to work on pedal assist level 3, starting at fully charged, I got all the way to my destination with 55-65% charge remaining. On the same commute and power assist level, but starting at 85-90% charge, I completely ran out of charge exactly when I arrived at my destination. This data was collected using the 48V 20Ah Hailong battery that came with my purchase. In conclusion, even though the cons I listed would suggest I don't like this motor, I do overall. For about half the price of the CYC Photon 2, it's a good deal.

I really like it. Installation was very easy and fast, and it is very smooth in operation. It adds only as much power as needed based on how hard I'm pedaling. It is so gentle with supplying the power that I can't tell when it is engaging. I ride this bike the same way, I would ride it without the motor. I pedal all the time and never use the throttle. On my longest ride, I rode 61 miles with power set to 1 (to conserve energy), with average speed of 17.5 mph, max around 22 (while pedalling, no throttle). The battery was empty on the last mile. The bike trail was almost flat. The motor with the battery added 22 lbs to the weight of my bike. Total weight is now 48 lbs, and I weight 240 lbs. I'd like to add that, I like working on bikes and I had all necessary tools except one. I had to buy a rivet nut tool ($27 including rivet nuts) and a 7mm drill bit to install additional bottle nuts in the frame, because the factory holes didn't match the holes in the battery mount. It was very easy job and I was doing this for the first time. I didn't install the brake sensors, and I don't see any advantage of having them installed. I even don't see the need for the speed sensor, but it's nice to see how fast I'm going without using additional bike computer or phone apps. There is a connector cable in the motor for the gear sensor. This sensor wasn't part of the kit but it could be very welcome. It's very inexpensive, so I considered adding it to the bike, to protect the drivetrain during gear shifting but now, after a few rides, I don't need it anymore. I quickly learned to stop pedaling for a moment while shifting and I don't experience any sudden jerks by the motor anymore. For those who don't know this, mid-drive motors pull the chain the same way biker's legs do, but the motor is much stronger and quicker, and if shifting is done under load (while pedaling), it creates very sharp jerks that can break the chain in some cases. So, the tip for others is to install the gear sensor or simply don't pedal for a moment while shifting. One more thing. This kit includes the throttle that is totally optional. Riding by using it instead of pedals is a lot of fun, and it powers the bike much better than legs giving a feeling similar to riding a motorcycle. On a test ride, on the street, I have reached 35 mph with the throttle. It was way too fast for my taste. Using the throttle discharges the battery very quickly, and it defeats the purpose of physical activity of riding a bicycle. At least for me. Customer service was extremally supportive. I installed the speed sensor incorrectly in the beginning, and it was confusing the motor's computer. They contacted me immediately and explained how it should be done. The sensor has to be perfectly perpendicular to the magnet, but mine was at a steep angle, because there was not enough space between the frame and the spokes. I solved it by removing the zip tie mount from the sensor, and I glued it to the frame with silicon. This kit is not a plug and play addition to the bike. Every bike has a different frame, and sometimes you have to be creative during the installation. My bike is 2005 Marin Larkspur. The motor noise is practically non-existent. I don't ride bikes in traffic anymore, so I compare this bike to a non-powered bike. If I was riding it on streets, I would pay more attention to top speeds and the battery performance on higher power levels. At this time, I don't know those things.

Seems to be a great motor, and a good seller to buy it from. Promptly shipped and delivered. I received the wrong brake sensors and the seller promptly sent the correct ones. I had a handful of questions and they were generally answered within a few hours. Some sellers are just filling orders, but these folks know (and support) the products. Am very happy with my purchase and with the support.

Easy to put onto my Northrock XC6, seller was very helpful when I messed up and needed a different part (the battery did not fit into my frame). The motor itself feels really nice to use; the first e-bike I had was a cadence sensor and WOW the torque sensor is so much nicer. And it's quiet -- I almost didn't believe it was on.